Date of Award
12-1990
Document Type
Thesis
Degree Name
Master of Science in Aeronautical Engineering
Department
Department of Aeronautics and Astronautics
First Advisor
Anthony N. Palazotto, PhD
Abstract
A geometric nonlinear technique is incorporated in a current finite element program. This nonlinear program allows material nonlinearity for calculating the stresses, strains and failure of composites. The improved program uses an updated Langrangian to calculate the stresses and strains. In addition, it updates the fiber orientation due to displacement in order to calculate the updated stiffness matrix. This method is valuable for large strain values. The analytical data were compared to experimental data obtained from Graphite PolyEtherEther Ketone laminates. To obtain data two geometries were used. Digitized photographs were used to measure the angle change for large strains.
AFIT Designator
AFIT-GAE-ENY-90D-08
DTIC Accession Number
ADA230527
Recommended Citation
Gould, Stephen C., "Investigation of Strain Characteristics of Graphite Polyetherether Ketone Using a Nonlinear Analysis and Experimental Methods" (1990). Theses and Dissertations. 7844.
https://scholar.afit.edu/etd/7844
Comments
The author's Vita page is omitted.